OSBC

Old Second Bancorp, Inc.

NASDAQ · Common stock

25.10

+0.26 (+1.05%)

Close, Oct 20, 2026

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Structural summary

What is the structure, what changed, and what would invalidate it

Viridia Intelligence

Context across dimensions, not a rating

StructureHigher highs, higher lowsIntermediate-degree swings on the daily chart.

WaveConstructiveImpulse, wave 5 up (Pattern Confidence 67); the weekly count agrees.

FibonacciAt a zoneNearest confluence 25.55–25.74 (5 relationships), +2.2% from the close.

MomentumPositive3 months +7.2% (ahead of SPY by 4.3 points); 6 months +17.5%.

RegimeMixed−0.1% vs the 50-day average, +12.5% vs the 200-day.

RiskNormal20-day volatility 13% vs 23% over the year; 1-year drawdown −10.2%; beta 0.47.

OSBC setup historyNot replayed yet; the track record fills in most-traded securities first.

Current structure

Price, swings and the preferred count on the chart

OSBC · 1DLoading bars…

SourceMassive, end of dayUpdated—MethodDaily bars, split-adjusted

Candidate interpretations

Every count shown passes every hard rule

Candidate interpretations

Ranked by Pattern Confidence

Counts ending at the latest intermediate swing low, 23.99 on Oct 1, 2026. 126 labelings tested, 90 broke a hard rule, 12+ remain.

Hard-rule evidence: why 90 labelings were eliminated

45Wave 2 always retraces less than 100% of wave 1
18Contracting triangle: C ends short of A's end, D short of B's end, and E short of C's end
12Contracting diagonal: wave 3 is shorter than wave 1, wave 5 shorter than wave 3, and wave 4 shorter than wave 2
5Wave B ends short of the start of wave A (a zigzag is a sharp correction)
4Wave B retraces at least 90% of wave A
3Wave 3 always travels beyond the end of wave 1

Method Every chain of 3–6 alternating pivots ending at the latest confirmed pivot is tested as each pattern; only counts with zero hard-rule failures are kept, then ranked by Pattern Confidence. Rules: rulebook.Engine pivots-1.0.0+rules-1.0.0+candidates-1.0.0+fib-1.0.1+rank-1.1.0+setup-1.0.1, bars to Oct 20, 2026

Fibonacci map

Confluence zones above and below the closeClose 25.10

25.10close

Bar length is the zone's strength (a weighted count of relationships, not a probability). Select a zone to see what forms it.

25.55 – 25.74+2.2% from the close

5 relationships · strength 5.6 · Intermediate, Minor degrees

25.74ProjectionThrust after the triangle ≈ width of wave A · Minor · EWP
25.68ProjectionWave C = 100% of wave A · Minor · Essentials
25.61ProjectionWave D = 78.6% of wave C · Intermediate · EWF · secondary ratio
25.55RetracementMove after the correction retraces 100% of A–C · Intermediate · Viridia · secondary ratio
25.55ProjectionWave 5 = 61.8% of wave 1 · Intermediate · Essentials · secondary ratio

Method Targets come from the Fibonacci relationships the sources describe for the wave in progress, Elliott trend channels, the prior fourth wave of lesser degree, and 38.2–78.6% retracements of the latest swing. A zone is where two or more independent relationships fall within max(¼ ATR, 0.4%) of each other; strength counts them, weighting primary ratios and higher degrees. It is not a probability.

Evidence

The setup the preferred count implies, and how that kind of setup has done

Setup

Intermediate degree · from the preferred count

No scenario at intermediate degree right now

The target is closer than the stop (reward:risk 0.82 : 1): most of the count's expected move has already happened, so it isn't a setup. Viridia shows nothing rather than a guess.

NoteResearch scenario generated from Viridia's structural model. Not a recommendation.MethodA setup restates the preferred count as a trade: the entry (the close, or the level where the correction in progress most often ends), the stop where the count is wrong (a rule level, or the end of a finished pattern), and the count's own Fibonacci target. Reward:risk is measured from the middle of the entry range. A setup needs reward:risk of at least 1 : 1. It is research output from the wave count, not a recommendation or a forecast.

Engine details

Analysis engine: pivots-1.0.0+rules-1.0.0+candidates-1.0.0+fib-1.0.1+rank-1.1.0+setup-1.0.1
Bars analysed to: Oct 20, 2026
Price history: Automatic, updated nightly
Daily bars: 516 since Sep 30, 2024
Avg volume, 50 days: 487.5K
Dollar volume, 20 days: $14.9M
SEC CIK: 0000357173
Provider symbols: nasdaqtrader: OSBC · massive: OSBC
Listing changes: None since Sep 24, 2026

SourcePrices: Massive (end of day, split-adjusted). Listings: Nasdaq Trader, SECUpdatedOct 22, 2026, 8:00 AM EDTMethodSecurity master, daily snapshot diff

MethodStructure: the intermediate-degree swing structure (higher highs and lows, lower highs and lows, expanding or contracting). Wave: the preferred daily wave count's expected direction (constructive up, defensive down), unresolved when the alternate is within 5 points. Fibonacci: the nearest confluence zone of Fibonacci relationships and the distance to it (inside, or within 3%, counts as at a zone). Regime: price against its 50- and 200-day averages. Momentum: 3-month return and its lead over SPY (strong when both are positive and the lead is over 5 points; weak when both are negative). Risk: 20-day volatility against the 1-year level (elevated above 1.25×), and the 1-year drawdown and beta to SPY.

Structure at a glance

Daily chart, as of Oct 20, 2026

Since the count's last pivot (23.99, Oct 1, 2026) price has moved +4.6%, the way the count expects.12 of 12 rule-valid counts expect the current move to be up.Weekly count: flat wave C ↑, same direction

Preferred count

Impulse up · wave 5 ↑

Price is in wave 5 of a five-wave advance (impulse).

1-2-3-4 from 16.43, Aug 1, 2025

Pattern Confidence67Medium

6 of 8 checks met

Key levels, preferred count

Invalidation−12.4% from close

22.00

Price below this level breaks the count.

Target, wave 5+10.2% from close

27.65

Wave 5 channel (line 2–4 through 3)

Nearest confluence zone+2.2% from close

25.55–25.74

5 Fibonacci relationships meet here.

Alternate count

Flat down · complete, next move up ↑

A three-wave flat correction down looks complete, so the larger trend would normally resume up.

A-B-C from 22.00, Jan 22, 2026

Pattern Confidence56Low

3 of 5 checks met

Why this count is preferred · 6 met, 2 not met

Met

Wave 2 retraces 50% to 85.4% of wave 1
Wave 4 retraces 14.6% to 38.2% of wave 3, and no more than 50%
Waves 2 and 4 alternate: one sharp and deep, the other shallow or sideways
Wave 3 moves faster (price per bar) than waves 1 and 5
Wave 3 has the heaviest average volume of the actionary waves
Waves 2 and 4 alternate in time too: the shallower correction takes at least as long

Not met

Wave 3 measures 161.8% or more of wave 1
The count starts at the price extreme of the prior swing (a new trend begins where the old one ended)

MethodPattern Confidence = (guidelines met + 2) ÷ (guidelines measured + 4), from the rulebook's guidelines, Fibonacci tendencies and wave-personality checks (wave 3 speed and volume, wave 5 volume, alternation in time, a start at the prior extreme), alternate waves in Fibonacci ratio, and the rarity of running flats. The alternate is the best-ranked count that tells a different story. It ranks the rule-valid counts against each other; it is not a probability of any outcome.

What changed

Structural events, most recent first

Oct 16, 2026New leading countNew leading count: Impulse w5 ↑ (confidence 67).
Oct 16, 2026Count droppedEnding Diagonal complete ↓ is no longer among the leading counts; now Impulse w5 ↑.
Oct 16, 2026Daily/weekly alignmentDaily and weekly counts now both point up.
Oct 16, 2026Swing confirmedA new intermediate swing low was confirmed.
Oct 15, 2026New Fib zoneA new Fibonacci confluence zone formed near 25.71.
Oct 9, 2026New Fib zoneA new Fibonacci confluence zone formed near 23.39.
Oct 7, 2026New Fib zoneA new Fibonacci confluence zone formed near 23.75.
Oct 6, 2026New Fib zoneA new Fibonacci confluence zone formed near 26.09.
Oct 5, 2026New Fib zoneA new Fibonacci confluence zone formed near 23.69.
Oct 2, 2026New Fib zoneA new Fibonacci confluence zone formed near 25.36.
Sep 30, 2026New Fib zoneA new Fibonacci confluence zone formed near 23.43.

Last swing high

26.06

Aug 17, 2026

Last swing low

23.99

Oct 1, 2026

Elliott Wave

Wave counts are built on these swings and each one passes every rule in the rulebook. They are ranked by how many guidelines they satisfy; the preferred and alternate counts are summarized above the chart.

MethodPrice versus its 50- and 200-day averages: above both with the 50 above the 200 is an uptrend, below both with the 50 below the 200 is a downtrend, anything else is mixed. Swings: adaptive ZigZag on daily bars, pivots-1.0.0+rules-1.0.0+candidates-1.0.0+fib-1.0.1+rank-1.1.0+setup-1.0.1.